Finding the Fourth Proportional to 1,501.02, 2,071.32 and 828.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,501.02 : 2,071.32 = 828.80 : x
2. Step 2: Convert to fraction form
   1,501.02/2,071.32 = 828.80/x
3. Step 3: Cross multiply
   1,501.02x = 2,071.32 × 828.80
4. Step 4: Simplify right side
   1,501.02x = 1,716,710.02
5. Step 5: Solve for x
   x = 1,716,710.02/1,501.02
6. Step 6: Final answer
   x = 1,143.70